This item is acquired in-game. See its sources below.
A Rare Plate Chest, item level 44, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Thunderpeak Breastplate is listed as Quest. Appearance ID: 26939. 5 other items wear the same appearance:
Read from the World of Warcraft client build files.
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Thunderpeak Breastplate suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Thunderpeak Breastplate is part of the transmog set Thunderpeak Boneguards (Warrior, Paladin and Death Knight only). The other 16 pieces:
Ettinbone Breastplate
Ettinbone Gauntlets
Ettinbone Girdle
Ettinbone Helm
Ettinbone Legplates
Ettinbone Pauldrons
Ettinbone Sabatons
Ettinbone Vambraces
Nar'thalas Protector's CapeLead-Studded ChestplateThunderpeak WarbootsThunderpeak GauntletsThunderpeak FaceguardThunderpeak LegguardsThunderpeak ShoulderguardsThunderpeak GirdleBuilt from the World of Warcraft client build files and recorded Auction House snapshots.
Thunderpeak Breastplate uses icon file 1117700, which 41 other items also use. The 6 closest by item ID:
Shaladrassil Chestguard ID 130012 · Armor - Plate · item level 50Dreadsworn Breastplate ID 129360 · Armor - Plate · item level 44Stormwing Plate Chestguard ID 129323 · Armor - Plate · item level 44Da Basher's Toy Armor ID 131775 · Armor - Plate · item level 44 "Only a few chunks of the toy remain inside."Traitor's Bane Breastplate ID 132937 · Armor - Plate · item level 44Dreadsworn Chestguard ID 134561 · Armor - Plate · item level 44Blizzard numbers items as they are created, so the named items next to ID 130286 (130279 to 130291) were usually added in the same batch as Thunderpeak Breastplate: the same quest line, zone, vendor or reward set.
Pinerock Tracker's Shoulderplates ID 130279 · Armor - Plate · item level 44Highmountain Trueshot Cape ID 130282 · Armor - Cloth · item level 44
Snowblind Vestments ID 130283 · Armor - Cloth · item level 44
Drogstitch Chestguard ID 130284 · Armor - Leather · item level 44
Whitewater Chestwrap ID 130285 · Armor - Mail · item level 44
Snowblind Bracers ID 130287 · Armor - Cloth · item level 44
Drogstitch Wristwraps ID 130288 · Armor - Leather · item level 44
Whitewater Wristguards ID 130289 · Armor - Mail · item level 44Thunderpeak Bracers ID 130290 · Armor - Plate · item level 44
Snowblind Gloves ID 130291 · Armor - Cloth · item level 44The raw ItemSparse values for item 130286 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB